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[ahr-suh-noh-pahy-rahyt, ahr-sen-uh-] /ˌɑr sə noʊˈpaɪ raɪt, ɑrˌsɛn ə-/
a common mineral, iron arsenic sulfide, FeAsS, occurring in silver-white to steel-gray crystals or masses: an ore of arsenic.
Also called mispickel.
Origin of arsenopyrite
1880-85; arseno- + pyrite Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for arsenopyrite
  • Metamorphism of pyrite and arsenopyrite does not increase their grain size.
  • Early pyrite or arsenopyrite as breccia filling or dissemination.
  • The gabbro may have been the heat source that concentrated the gold which is found in disseminated arsenopyrite.
British Dictionary definitions for arsenopyrite


/ˌɑːsɪnəʊˈpaɪraɪt; ɑːˌsɛnə-/
a white or grey metallic mineral consisting of a sulphide of iron and arsenic that forms monoclinic crystals with an orthorhombic shape: an ore of arsenic. Formula: FeAsS Also called mispickel
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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